This document provides a history of the employer-provided health benefits system in the United States. It discusses how private health insurance originated in the early 20th century led by hospitals and doctors. During World War II, employer-provided health benefits rose as the government exempted such benefits from wage controls. The system expanded further in the post-war years. Organized labor also came to support the employer-based model through collective bargaining. However, the system has led to issues such as inequality and a lack of choice. Several presidential administrations have attempted but failed to reform the system through an employer mandate.